<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- 可以输入的最大单词数 -->
    <script>
      var canBeTypedWords = function (text, brokenLetters) {
        return text.split(' ').filter(word => brokenLetters.split('').every(br => word.indexOf(br) < 0)).length
      }
      console.log(canBeTypedWords('hello world', 'ad'))
    </script>
  </body>
</html>
